What would happen to a wheel if you run it at the speed of sound? Russian machinists at Garage 54 decided to find out: they put together a 2.5-liter 200 horsepower Toyota engine with automatic transmission, then hooked it up to a wheel and sent it rotating at 828 mph (1332 kph).
Once the wheel broke the speed of sound, the tire exploded!
via Jalopnik